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 Liquid Helium Management

Helium Reliquefiers

Do you only have one cryostat using liquid helium? A Cryomech Helium Reliquefier (HeRL) turns a single open-cycle cryostat into a closed-cycle with no helium losses. Reliquefiers have been proven to integrate seamlessly into many different cryostat designs. Cryomech has developed reliquefiers for use with highly sensitive MEG magnetometers, MPMS, PPMS, MRIs, NMRs, superconducting magnets and dilution refrigerators.

   
Easy drop-in installation through existing fill port
   
Can liquefy room temperature helium gas from cylinders
   
Compatible with most cryostats

  • PT410 Reliquefier

    Helium Reliquefier

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  • PT415

    Helium Reliquefier

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  • HeRL45

    Helium Reliquefier

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Liquid Helium Plants


Do any of these statements apply to you?

    I want to take control of my liquid helium supply.
    I have received notice of change in availability and price from my liquid helium supplier.
    I have multiple cryostats in my lab that require liquid helium for proper operation.
    I want a solution designed around my needs.

Don’t be without helium. Don’t let your liquid helium supplier control your experiments.

Cryomech Liquid Helium Plants allow the user to liquefy helium from any room temperature source. Now laboratories can manage their own liquid helium consumption and conservation. With a Cryomech Helium Recovery System, facilities with several cryostats with different boil-off rates can use one Liquid Helium Plant.
Quick Facts about Cryomech Liquid Helium Plants:

    Available liquefaction rates:
        6, 15, 22, 40, and 60 liters per day (see chart below)
    Powered by a Cryomech Pulse Tube Crycooler, designed with high reliability with long mean times between maintenance
    In operation all over the world
    Operate 24 hours a day, seven days a week reliably, automatically and safely
    Multiple recovery capacities available (for use with the Cryomech Helium Recovery System)

All Cryomech Liquid Helium Plants Include the Following:

    Digital touch screen user interface that includes:
        Remote monitoring and control
        Digital level indicator
        System diagnostics
    Rugged, stainless steel, liquid helium Dewar
    Cryogenically insulated extraction line and valve for low loss liquid helium transfer
    Automatic level indicator initiates standby mode when Dewar is full
    Warranty of three years or 12,000 hours on parts and materials
    Pressure relief and safety valves
    Design increases reliability by not including JT valves, which are common in other liquefaction products


Helium Recovery Systems


Cryomech Helium Recovery Systems Include the Following Components:

    Atmospheric Helium Recovery Bag
    Helium Recovery Compressor
    Gas Cylinders
    Automatic Purifier


More Details on the Cryomech Helium Recovery System Components:

Atmospheric Helium Recovery Bag – The Recovery Bag is made of a durable vinyl-based polymer material. Laser positioning sensors automatically start the recovery compressor (described below) when the bag is full and stop the compressor when the bag is empty. Many users prefer Cryomech’s simple, effective design for atmospheric storage of helium gas in that it eliminates over-pressurizing their instruments, which may cause adverse effects including elevated LHe bath temperatures.

Recovery Compressor – The Medium Pressure Recovery Compressor compresses the helium gas stored in the Recovery Bag at atmosphere to a pressure of up to 400 PSIG (27.58 bar), while our High Pressure option reaches a pressure up to 2,400 PSIG (165.47 bar). Operation is fully automatic and the hermetically sealed system design allows for zero helium loss. The recovery rate of the Medium-Pressure Recovery Compressor is ~8.5 SCFM (~20 liquid liters per hour) and the recovery rate of the High-Pressure Recovery Compressor is ~5.1 SCFM (~10 liquid liters per hour).

Storage Cylinders and Manifold – The compressed helium gas exiting the Recovery Compressor at pressures of either 400 PSIG (27.58 bar) or 2,400 PSIG (29.3 bar) enters the Storage Cylinders through a stainless steel manifold. A pressure regulator is attached to the outlet of the manifold to regulate the helium flow to the Helium Purifier. Each Medium-Pressure Storage Cylinder can store ~17 liquid liters of helium, while the High-Pressure Storage Cylinder can store ~11 liquid liters of helium.

Automatic Purifier – Cryomech has developed an Automatic Helium Purifier to sell alongside its liquid nitrogen-cooled purifiers. Unlike the liquid nitrogen-cooled purifiers that require weekly liquid nitrogen refills and monthly trap regeneration, the Automatic Purifier runs indefinitely without any user intervention. Trap cooling is provided by a Cryomech GM Cryocooler and all equipment necessary for regeneration of the trap is included in the purifier. A PLC with 5-inch touch screen automatically determines when the trap needs to be regenerated and efficiently carries out the regeneration process. Total downtime for regeneration is limited to less than eight hours. The Automatic Purifier is fully compatible with all existing Cryomech Liquid Helium Plants.